/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.state.api.utils;

import org.apache.flink.core.testutils.OneShotLatch;

import java.io.Serializable;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;

/**
 * {@link org.apache.flink.core.testutils.OneShotLatch} which able to survive
 * serialization/deserialization.
 */
public class OperatorLatch implements Serializable {
    private static final Map<String, OneShotLatch> guards = new ConcurrentHashMap<>();

    private final String guardId = UUID.randomUUID().toString();

    public OperatorLatch() {
        guards.put(guardId, new OneShotLatch());
    }

    public void trigger() {
        guards.get(guardId).trigger();
    }

    public void await() throws RuntimeException {
        try {
            guards.get(guardId).await();
        } catch (InterruptedException e) {
            throw new RuntimeException("Failed to await operator");
        }
    }
}
